专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0517638A POLYPROPYLENE COMPOSITION 失效
公开(公告)号：JPH0517638A
公开(公告)日：1993-01-26
申请号：JP16707191
申请日：1991-07-08
申请人： TOKUYAMA SODA KK
发明人： OGAKI KUNIYOSHI , NIINA MITSUHARU , ASAEDA EITARO
IPC分类号： C08K3/34 , C08J5/18 , C08L23/10 , C08L53/00
摘要： PURPOSE:To provide a polypropylene composition in which the dispersibility of the antiblocking agent is good even when polypropylene particles of a low content of fines are used and which is suited for giving a transparent film good in blocking resistance. CONSTITUTION:A polypropylene composition comprising 100 pts.wt. polypropylene particles having a heating loss of 400 ppm or below and containing 1.5wt.% or below particles of a particle diameter of 100mum or below and 0.1-1.0 pt.wt. antiblocking agent such as silicon dioxide or aluminosilicate.

2. 发明专利

JPH02170803A PRODUCTION OF POLYOLEFIN 失效
公开(公告)号：JPH02170803A
公开(公告)日：1990-07-02
申请号：JP32362288
申请日：1988-12-23
申请人： TOKUYAMA SODA KK
发明人： KITAJIMA YOSHIYUKI , OGAKI KUNIYOSHI , ASAEDA EITARO
IPC分类号： C08F4/657 , C08F4/60 , C08F4/655 , C08F10/00
摘要： PURPOSE:To obtain a polymer of high stereoregularity, broad molecular weight distribution and good moldability by polymerizing an olefin in the presence of a polyolefin containing titanium, resulting from preliminary polymerization, an organoaluminum specific, a specific organosilicon compound and ethyl silicate. CONSTITUTION:The polymerization of an olefin such as ethylene, propylene or butene-1 is conducted in the presence of (A) a preliminarily polymerized polyolefin containing titanium such as preliminary polymerization product of an olefin in the presence of a titanium compound and an organoaluminum compound, (B) an organoaluminum compound, preferably triethylaluminum, (C) an organosilicon compound of the formula (R, R' are hydrocarbon; n is 1 to 3) such as trimethylmethoxysilane, and (D) ethyl silicate to give the subject polyolefin.

3. 发明专利

JPS6260629A MANUFACTURE OF STRETCHED FILM 失效
公开(公告)号：JPS6260629A
公开(公告)日：1987-03-17
申请号：JP19947885
申请日：1985-09-11
申请人： TOKUYAMA SODA KK
发明人： KAMURA MITSUO , KURAMOTO NAOHIKO , OGAKI KUNIYOSHI
IPC分类号： B29C55/02 , B29K81/00 , B29L7/00 , C08J5/18
摘要： PURPOSE:To improve the mechanical properties of stretched films by a method in which a polysulfone resin film is subjected to a zone-stretching process under a condition that the temperature of the film, which is calculated in terms of a specific formula, is within the range from temperatures lower than the secon dary transition temperature of polysulfone resin to the secondary transition temperature. CONSTITUTION:A polysulfone resin film 2 is subjected to a zone-stretching process under a condition that the temperature (t deg.C) of the film, which is calculated by the formula (1), is within the range from a temperature 25 deg.C lower than the secondary transition temperature of the resin to the secondary transition temperature (less in hereinafter Tg) of the resin. In the formula (1), t0 is initial temperature ( deg.C) of the film, t1 is heating temperature ( deg.C), tau is heating time (hour) of the film, and a is thickness (m) of the film. The stretched film so obtained has extremely high molecular orientation bacause it is heated and stretched at Tg or within a specific temperature range slightly lower than Tg, and the molecular orientation is fixed without relaxation because of the narrow heating zone. Stretched film having excellent thickness accuracy can thus be obtained.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式